You will need to create an AWS Credentials File. I’m not sure what changed, and why these tools don’t use BASH environment variables, but I use ~/.aws_credentials. You’ll also need to do this if you use the RDS CLI tools.

AWSAccessKeyId=AWSSecretKey=

And then you need to create a BASH environment variable pointing to the newly created file. Put this in ~/.bash_profile.

To install Amazon’s Relational Database Service CLI Tools, you will need to be sure to include the credentials file created above, and the BASH line to point to it. You will then simply need to add a couple more lines to ~/.bash_profile.